Rohde and Schwarz CBT-35 Bluetooth Tester

The Rohde & Schwarz CBT-35 is a Bluetooth tester for RF measurements, protocol analysis, and functional testing across Bluetooth BR, EDR, and BLE standards. It performs comprehensive RF characterization on all channels in hopping or non-hopping modes, supports statistical monitoring with user-defined tolerances, and enables high-throughput testing in production and R&D environments.

Technical Specifications

• Bluetooth 1.2 through 4.2


• Bluetooth Basic Rate (BR)


• Enhanced Data Rate (EDR)


• Bluetooth Low Energy (BLE)


• Bluetooth 3.0 + HS RF Measurements


• Power measurements across all transmit power levels with control functionality


• Modulation analysis (GFSK and DPSK)


• Frequency accuracy and drift characterization


• Spectrum measurements without external analyzers


• EDR in-band spurious emissions testing


• Statistical monitoring with configurable measurement stop conditions Protocol & Functional Testing


• Bluetooth BR and EDR packet analysis


• Bit Error Rate (BER) testing


• Receiver quality measurements (RX)


• Power control commands with 2–8 dB dynamic range per specification Audio Testing Capabilities


• Microphone input, amplifier, and A/D converter characterization


• D/A converter, output amplifier, and speaker/earpiece testing


• Single-tone measurements: audio level (RMS, peak), DC level, frequency, SINAD, THD+N


• R&S CBT-B41 option enables multitone frequency response testing (up to 20 tones per channel)

Key Features Measurement tolerance definition and automated sequencing. Power level difference monitoring between consecutive commands. Integration of spectrum analysis eliminates external equipment dependencies. Speed and flexibility optimized for both laboratory troubleshooting and production throughput.

Typical Applications

• Bluetooth device and module validation


• RF compliance and performance verification


• Audio codec and path characterization


• Production functional and quality testing


• R&D protocol development and debugging

Compatibility & Integration Supports all Bluetooth standards from 1.2 through 4.2. Optional R&S CBT-B41 module extends audio measurement capability.